1801 Adobe Photoshop Large Document Format Image (Raster) Adobe Photoshop is a raster graphics editor developed and published by Adobe Systems. The Large Document Format supports documents of up to 300,000 pixels in any dimension as opposed to the PSD limit of 30,000 pixels. 1 Digital Preservation Department / The National Archives 21 Mar 2017 21 Mar 2017 fmt/996 PUID image/vnd.adobe.photoshop MIME psb File extension 1356 Adobe Photoshop PSB BOF: '8BPS', version 2 (0x0002), 6 reserved null bytes https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/ 1 Absolute from BOF 0 0 384250530002000000000000 Is subsequent version of 139 Adobe Photoshop